It kinda floats up and down under a constant cruise or easy acceleration or even idling. But everything checks out on the Autotap and at WOT its cracked all the way to the right...just an old tired gauge?
It started after I did the boost bypass mod. I thought that it was a dry rotted vac line but after replacing all those lines and the problem still existing - I pushed the bypass back up a little and it went away. So who knows?